Floating Items

I would like to make it so that items with a specific tag will not have gravity and will float when they are dropped. I would like to have it so that if the player dies, the player drops an item, or if it is launched from a dispenser/dropper the item floats. Essentially, any time that the item is in entity form it floats and is not impacted by gravity.

I cannot for the life of me figure out how to make it float in all of those conditions, only for when the player presses Q and drops it.

Thanks :)